Questions tagged [steganography]
Steganography is the art and science of writing hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message. While cryptography protects the contents of a communication, steganography aims to prevent others from learning that a communication even occurred.
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Extracting secret image from cover image
I want to develop a steganography project with using exploiting modification direction method. I started to try and understand how the method works, but I have some questions about decryption.
I hid ...
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Why did Histiaeus tattoo his slave's head?
The story is often told that Histiaeus tattooed a secret message on his slave's head, waited for his hair to grow back, then sent him off to Miletus. Why would he have done this?
The story is usually ...
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Does limiting the sales market to U.S. only, releive my application of Export Admin Regs? [closed]
I have a steganography application that uses one-time-pad encryption. Obviously, key lengths can be very long.
If I were to limit the sales market on the Microsoft Store to U.S. only, would that be ...
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Pad ciphertext with arbitrary number of bits
I have a symmetric-key encryption scheme. I think the output from this scheme (MAC + IV + CBC ciphertext) should already be practically indistinguishable from random, but I would like to pad the ...
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Steganography in speech by adding extra "filler" syllables [closed]
PREAMBLE
About 20 years ago, when reading a novel (set in late 1800) by some classic Russian writer I came across very curious example of steganography. The two main characters were peasants who got ...
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Uncovering file hidden in .BMP
I've recently been linked by someone to this particular puzzle which seems to point to a hidden file within the image. The clue given to me was "anagram" although I could not make much sense of it. ...
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Steganography - How many bytes of information can you hide in a $1024 \times 768$ photo?
I have a photo with a resolution of $1024 \times 768$ which means $786432$ pixels in total. Let's suppose it's a 24-bit color RGB image (so 1 pixel = 3 bytes = 24 bits) and I want to hide information ...
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Standard format to store text in LSB steganography?
I am trying to understand how text is stored in images in LSB.
If we consider a 24 bit image, we have 3 values per pixel (RGB). So we can store 3 bits in a pixel. So how do we store 'A' or any other ...
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Determine whether bit sequence is hash?
I would like to know whether it is possible to determine whether a value of for example 256 bit length is a SHA-256 hash or a random, equally distributed value. Is ...
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Algorithms of steganography [closed]
Recently I'm working on steganography and I want to know that what are the main steganography algorithms and how they work.
I'll be happy if you help me.
thanks.
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Is my high school cryptography/steganography science fair project practical?
I'm a 12th grade student interested in a science project in cryptography and steganography for my school's science fair. I chose this path of computer science partly because my coding skills are weak (...
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WAV file steganography
I'm trying to find a hidden message in a WAV file. It's a song, not some noisy sound. My question is where should I look for the message in data RIFF, FMT or DATA chunk. Should I convert the file to ...
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Is there a way to cleanse a picture of information from steghide?
Recently I learned of the steghide application (a command-line tool allowing the use of steganography, the art of hiding information inside other information, used in practice with JGP and WAV files ...
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Is there any tool for text steganography? [closed]
i wanna ask anyone that know is there any tool or software to hide text in text it self, that we usually call it as text steganography?
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Performance checking of Image Steganography Technique
I am working with image Steganography LSB technique (Lossless Compression) as the performance of it is measured in PSNR value. Higher PSNR value greater the performance. But what is the standered ...
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Binary format of encrypted PGP private key?
Short Version of the Question:
I would like to remove any predictable information from an encrypted private keys binary representation. Does anyone have a hint where the binary format for encrypted ...
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Practicality of codebook in current-day secret communications
Codebook appears, if I don't err, to be an antiquitated topic rarely touched upon in discussions of modern cryptography. Couldn't codebook nonetheless be of high practical utility and even be ...
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How to disguise ciphertext
If I want to have a secret conversation, then I can encrypt it (with OTR etc). However, since big brother watches all communication, sending encrypted data will likely raise flags. Does anyone know of ...
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Data integrity using steganographic methods
I am looking for a lightweight and fast (almost real time) data integrity checker for a very time critical application. Is it possible to provide data integrity using a steganographic method, lets say ...
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Are there any practical methods of steganography?
There isn't a whole lot of information on steganography in the modern age, from what I can tell. A google search for steganography usually brings up a list of very impractical methods (e.g. tattooing ...
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Why does image size increase after steganography?
I am working on a steganography technique. Sometimes I need to send my steganographed images online to my friends but in the process the image gets compressed destroying all the data. I found ways to ...
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Steganographic embedding of an RSA-encrypted message into an image
The goal is to combine the RSA encryption system with the LSB steganography system in a BMP image. Since every pixel of the image is an integer between 0 and 255, if we choose $p$ and $q$ such that $N ...
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Is there an algorithm to hide text in another text, while preserving the meaning of the latter?
Is there a way to hide a text message $A$ inside another text $B$ using a cryptographic cipher/algorithm, while preserving the sense/meaning of $B$ and without anybody being able to notice there is a ...
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Is it possible to combine cryptography with steganography [closed]
Definitions:
M - original message,
Me - encrypted message M,
S - watermark message,
Ms - message M with steganography watermark S,
e - encryption private key,
d - decryption key (it is private too),
s ...
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The example of Wikipedia on steganography doesn't work
I was reading some stuff on steganography.
There is an example on the wikipedia page :
However, I tried many software to get the hidden image, but no one worked. Is there anything wrong about that?
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Is it worth hiding an AES encrypted text string in a PNG image for better security?
I need advice as to whether it is worth the extra "security" and processing of an AES encrypted text string to be hidden in a PNG image as opposed to an AES encrypted text string to be saved in a read-...
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Maximum steganographic embedding rate not detectable by steganalysis?
When using advanced steganographic methods (like F5) what is the approximate maximum embedding rate when advanced Steganalysis (like a machine learning approach) can no longer reliably detect it?
I ...
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Detecting steganography by analysing non-significant data entropy?
I am not thinking only steganography in images, I think it is also possible to encode data for example into the length of spaces of a clear html text.
I suspect, the steganography changes (elevates) ...
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Which is the most secure steganography technique? [closed]
Just like we have AES in crypotography, which is the most secure technique in Steganography?
I am looking for a technique in which the standard image characteristic modifications it does go undetected(...
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Turning data into seemingly random noise
I am currently working on a python script that does image steganography, altering the least significant bit on each channel of the image. Now imagine encrypting a file with a bunch of null bytes, or ...
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Defining format-preserving encryption for natural language
Assume we have plaintext in natural language. Can we use format-preserving encryption in such a way that the produced ciphertext cannot be distinguished from natural language?
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Steganography Decryption From Completely Black Image
I am trying to decrypt a completely black gif that I know has been encrypted by some sort of steganography. I've tried subtracting the bytes of the images with each other, and so far I have gotten a ...
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How secure is it to use password as AES key?
I am developing a steganography app where user encrypt any file into an audio file. The user can enter a password to protect the hidden data. The same password is converted as a 256 bit key and the ...
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What approach is used here? [closed]
Here is an image hidding some information.
I need to discover, what is the hidden text.
I tried to interpret this as 27 letter alphabet(with space) in columns, tried this with Ceasar cipher.
No ...
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How to establish if a string contains a message
If you have a string S, then the string can be composed of four things:
cleartext
'random' data
encrypted data
compressed or otherwise non-encrypted, but modified, cleartext
If you want to see if ...
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Detecting steganography in the stream of short messages
I have stream of millions of short n-bit (n<30) messages generated by some random number generator. The source of random number generator is not available to me.
I suspect there are messages used ...
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What makes LSBit steganography detectable? And what would help in concealing it?
In a project of mine I took a 24-bit bitmap image and I performed LSBit steganography over it (saved a black and white image inside each of the planes R, G, B) using pixel shuffling and xor encryption....
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Making my steganography code more hard to detect and crack
I'm doing a college project about digital image steganography on MATLAB. So far i've been able to get the help i needed from cool guys on stackoverflow but i now need to make my algorithm more hard to ...
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Digital identification using steganography, can it be broken?
Digital identification using steganography, can it be broken?
I have read a few articles saying that using an I.D. embedded in video, audio, etc can help track down the origin of a copyright ...
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Testing a steganalysis technique on realistic data [closed]
I'm developing a new image steganalysis technique, and I'd like to test how effective it is in practice. How could I do this? Are there such things as standard "test vectors" for steganalysis?
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Is there a cryptographic method to add noise to a plaintext instead of actually encrypting it?
I'm looking for a cryptographic technique that instead of permuting a cleartext, would add noise to the cleartext to obfuscate the true text among a bunch of garbage. For example, a list of 10 ...
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Rating a steganographic system using Blum Blum Shub to locate hidden bits
Currently I'm building a toy steganography system based in a web browser. Besides all the obvious issues with building a system requiring extreme privacy into a browser (this is a toy!), I was curious ...
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Algorithm/Technique for Steganography [closed]
What is the most used Algorithm/Technique in Steganography? I made some research about the algorithm/technique and I think Least Significat Bit(LSB) is the most used algorithm, is there any more ...
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Obtaining a key that's using ice algorithm
I have a text file that has been processed by the SNOW steganography tool that uses ICE encryption. However, I do not know the key that would enable me to decrypt and retrieve the message hidden.
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Any efficient text-based steganographic schemes?
Sophisticated and efficient steganographic schemes with images as cover are available. However, I wonder: are there any that use texts as cover instead?
If one could only transfer a few printable ...
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How to hide bit frequency of the inter-packet delays covert channel?
I encode a hidden message as different delays between packets of another data stream.
My implementation now is that for each bit,
if the bit is 0, a inter-packet ...
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